storybook: Docs addon fails to render props table when source code uses default export types

Describe the bug In a TypeScript React (non-CRA) setup with the Docs addon and the react-docgen-typescript-loader, the props table will not work if you use the React default export’s properties for type definitions.

(Please ignore the fact that the example uses React.FC. It’s still an issue outside of this.)

In other words… WORKS:

import React, { ButtonHTMLAttributes, FC } from 'react';

export interface Props extends ButtonHTMLAttributes<HTMLButtonElement> {
  isDisabled?: boolean;
}

export const Button: FC<Props> = ({ isDisabled = false, ...props }: Props) => (
  <button disabled={isDisabled} {...props} />
);

DOES NOT WORK:

import React from 'react';

export interface Props extends React.ButtonHTMLAttributes<HTMLButtonElement> {
  isDisabled?: boolean;
}

export const Button: React.FC<Props> = ({ isDisabled = false, ...props }: Props) => (
  <button disabled={isDisabled} {...props} />
);

For what it’s worth, if you use a named export type for FC, but keep doing React.ButtonHTMLAttributes, then you’ll only see isDisabled defined in the table.

To Reproduce Steps to reproduce the behavior:

1. npx -p @storybook/cli sb init --type react

2. yarn add -D ts-loader @storybook/addon-docs @storybook/addon-info react-docgen-typescript-loader react-is babel-loader

3. .storybook/main.js:

module.exports = {
  stories: ['../src/**/*.stories.(tsx|mdx)'],
  addons: ['@storybook/addon-actions', '@storybook/addon-links', '@storybook/addon-docs'],
  webpackFinal: async (config) => {
    config.module.rules.push({
      test: /\.(ts|tsx)$/,
      use: [
        {
          loader: require.resolve('ts-loader'),
          options: {
            transpileOnly: true,
          },
        },
        {
          loader: require.resolve('react-docgen-typescript-loader'),
        },
      ],
    });

    config.resolve.extensions.push('.ts', '.tsx');

    return config;
  },
};

and create some stories to compare!

Expected behavior I should be able to create stories regardless of how I use types from dependencies.

System:

Environment Info:

  System:
    OS: macOS Mojave 10.14.6
    CPU: (16) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
  Binaries:
    Node: 10.18.1 - ~/.nvm/versions/node/v10.18.1/bin/node
    Yarn: 1.21.1 - ~/.nvm/versions/node/v10.18.1/bin/yarn
    npm: 6.13.4 - ~/.nvm/versions/node/v10.18.1/bin/npm
  Browsers:
    Chrome: 79.0.3945.130
    Safari: 13.0.4
  npmPackages:
    @storybook/addon-actions: ^5.3.6 => 5.3.6 
    @storybook/addon-docs: ^5.3.7 => 5.3.7 
    @storybook/addon-info: ^5.3.7 => 5.3.7 
    @storybook/addon-links: ^5.3.6 => 5.3.6 
    @storybook/addons: ^5.3.6 => 5.3.6 
    @storybook/react: ^5.3.6 => 5.3.6